JPS58284B2 - combine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION In general, in combine harvesters, when turning at the end of the stroke, etc., the pre-harvesting section is raised to an appropriate height so that it does not come into contact with the ground or stumps, When entering the culm group, the pre-reaping treatment section is lowered to a predetermined cutting height position in order to maintain a predetermined cutting height.

In recent years, automation has been promoted to lower the pre-cutting processing unit to a predetermined cutting height position as described above.
Research and development has been conducted on means for automatically detecting the presence of shell culms to be introduced into the pre-harvesting treatment section and automatically lowering the culms based on the detection results.

However, conventionally, in order to detect the presence or absence of a culm, a sensor that rotates around the vertical axis is attached directly to the reaping pretreatment section, and the presence of a culm is detected by the backward swinging of the sensor due to contact with the culm. However, in this case, the sensor is displaced upward as the pre-harvesting section rises and comes into contact with the culm junction, which tends to move unexpectedly, making it difficult to detect it accurately. This method is difficult to perform, and there is a problem in that when the culm is lodging, the required detection cannot be performed.

The present invention has been made with the above circumstances in mind, and
It is an object of this invention to enable accurate detection of the presence of a culm by rationally improving the means for detecting the presence of a culm, thereby achieving good automatic descending control.

Embodiments of the present invention will be described in detail below with reference to illustrative drawings.

The figure shows a device 3 for raising four planted culms into an upright position, and a device 3 for raising four planted culms into an upright position. A reaping device 4 that cuts off the base end of the stock, an auxiliary conveyance device 5 that conveys the cut culms laterally and merges them, and a vertical conveyance of the merged culms toward the feed chain 6 of the rear threshing device 2. Device 7
A combine harvester is shown which is connected and equipped with a pre-reaping processing section 8 consisting of the following.

Of the four planted stem culm introduction paths A1, A2, A3, and A4 formed along the lateral side of the pulling device 3, the leftmost path A1 (the most uncut side during normal round mowing work) The path located in the path A) is swingable in the front and back direction.
a pair of left and right first parts that are elastically biased into a position protruding into I;
Second sensor 9a.

9b, and a third sensor 10 is provided in the rightmost path A4 of the paths A1, . It is being

Then, based on the detection results of the presence or absence of stem culms from these sensors 9a, the steering clutches (not shown) of the crawler traveling devices 1, 1 are automatically operated on and off to control the stem culms. The system is configured to perform automatic steering control so as to follow the vehicle.

In other words, during reaping traveling along the planted stem culm row, the first
, the second rocking sensor 9a, 9b is used, and when the first rocking sensor 9a on the left side is pushed by the culm and swings backward more than a certain amount, it turns to the left, and conversely, the second rocking sensor on the right side swings. sensor 9
When b is swung backwards beyond a certain level, it is made to turn to the right, and in other situations, it is made to go straight.

In addition, when reaping is carried out along a direction perpendicular to the planted stem culm row, so-called lateral row, the third swing sensor 10 is used, and when the sensor 10 swings backward a little, it is moved straight, and from this state It is configured to turn to the right when it is greatly swung backwards, and to turn to the left when it approaches the protruding position.

The reaping pre-treatment section 8 is supported via an elevating frame 11 which is pivotally connected to the machine so as to be able to swing up and down, and is supported by a hydraulic pressure interposed between the elevating frame 11 and the machine. The first . Based on the detection results of the second and third rocking sensors 9a and the culm presence/absence detecting sensor 13, which will be described below, automatic elevation control is performed as described below.

The sensor 13 is connected to a sensor box 15 provided on the back of a divider 14 provided at the lower end of the lifting device 3.
The box 15 is rotatably supported around a horizontal axis, and is configured to be able to swing up and down, and the limit of downward swing with respect to the box 15 is regulated by contact with a stopper 16 provided on the box 15. There is.

The sensor box 15 is rotatably supported on the divider 14 about a horizontal axis, and has a swing arm 17 and a release wire 18 that are integrally connected to the pivot base of the elevating frame 11. The lift frame 11 (reaping pre-processing section 8) is rotated downward as the elevating frame 11 (reaping pre-processing section 8) rises.
is configured to be rotated upward as the
With this vertical movement, the sensor 13 is configured to be able to be switched between a position in which it protrudes below the preprocessing section 8 and a position in which it is retracted upward.

The hydraulic cylinder 12 is connected to each sensor 9a.
The pre-reaping processing section 8 is configured to be automatically raised and lowered to a predetermined cutting height position and a position away from the ground as the reaping pre-processing section 8 is expanded and contracted based on the detection results of the following.

In other words, when the aircraft reaches the end of one stroke, the first. Second. Third rocking sensor 9a, 9b.

When it is electrically detected by a switch mechanism (not shown) provided at the base of each sensor 9a that all of the sensors 10 are in a position to protrude into the path, the pre-reaping processing unit 8 is removed from the ground. When the aircraft attempts to enter the culm group again after being raised to a distant position and making a turn, the sensor 13, which is in a downward protruding position, swings backwards upward due to contact with the culm.
A cam body 19 formed at the base of the sensor 13 presses an electric switch 20, and based on a signal from the switch 20, the pre-reaping processing section 8 is lowered to a predetermined cutting height position.

Note that the sensor box 15 is connected to the reaping pre-processing section 8.
The reaping latch lever 21, which turns on and off the transmission clutch (not shown), is interlocked with the release wire 22, and when the lever 21 is operated to the engaged position a, the reaping pre-processing section 8 is activated as described above. Although it is rotated in conjunction with lifting and lowering, when the lever 21 is operated to the off position, it is configured to rotate upward and hold the sensor 13 in an upwardly retracted position. This prevents the sensor 13 from being damaged due to contact with other objects.

In the embodiment, the sensor 13 is forcibly retracted upward when the reaping pre-processing section 8 is at a predetermined mowing height position, but it is also possible to retract the sensor 13 by making contact with the culm or the ground. It may also be implemented in the form of

Further, in the embodiment, the sensor 13 that rotates around the horizontal axis is illustrated, but the same implementation can be performed using a sensor that rotates around the vertical axis.

In summary, the combine harvester according to the present invention has a mower near the front end of the reaping pre-processing section that protrudes downward from the pre-processing section when the pre-processing section is raised, and retracts upward when the pre-processing section is at a predetermined cutting height. A sensor for detecting the presence or absence of a planted culm to be introduced into the pre-harvesting treatment section is provided, and the pre-harvesting section is automatically lowered to a predetermined cutting height position based on the detection result of the culm in the downward protruding position of this sensor. It is characterized by:

That is, since the sensor for detecting the presence or absence of culm is made to protrude downward from the pre-reaping section when the pre-harvesting section is raised, the sensor acts near the plant base where it will not move unexpectedly. This makes it possible to perform accurate detection, and to perform desired detection even when the shell culm is lodging, making it possible to perform accurate automatic descent control.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the combine harvester according to the invention,
Figure 1 is a schematic side view of the front part of the combine, Figure 2 is a schematic plan view of the rocking sensor attachment part, Figure 3 is a longitudinal rear view showing the attachment part of the culm presence/absence detection sensor, and Figure 4 is the sensor and It is an interlocking diagram with a reaping pre-processing part. 8... Reaping pre-processing section, 13... Culm presence/absence detection sensor.

Claims (1)

[Claims] 1. A pre-reaping treatment located near the front end of the pre-reaping treatment section 8 that projects downward from the pre-treatment section 8 when the pre-treatment section 8 is raised and retracts upward when the pre-treatment section 8 is at a predetermined cutting height. A sensor 13 for detecting the presence or absence of a planted culm to be introduced into the section 8 is provided, and the reaping pre-processing section 8 is automatically lowered to a predetermined mowing height position based on the detection result of the culm in the downward protruding position of this sensor 13. A combine harvester characterized by being configured as follows.